Assembly overview: Brake pedal, Audi S4/S6 — AUDI

Warning!
The brake pedal travel must not be shortened by additional floor coverings.
Locking clip
Renew each time after removing
Fit onto pin

Over-centre spring
Green marking
Removing and installing
=> Fig.
2

Self-locking nut, 25 Nm
Renew each time after removing

Mounting
Disengage Procon cable on removal

Rear spring for brake pedal
Installation position: Long arm in mounting bracket and short arm in brake pedal

Brake pedal
Slip onto shaft of mounting bracket
Replacement part supplied with moulded mounting bush which cannot be replaced
To remove and install, remove mounting bracket

Locking clip
Renew each time after removing
Attach to shaft of mounting bracket

Nut, 25 Nm
Brake light switch
Adjusting:

Brake pedal operated
Press in brake light switch as far as it will go
Pull back brake pedal as far as it will go

Vent valves
Adjusting:

Operating brake and clutch pedals
Press in vent valve as far as it will go
Pull back brake and clutch pedal as far as they will go

Clip
Renew each time after removing
Insert in mounting bracket

Hexagon nut 10 Nm
Cheese head bolts, 20 Nm
Master cylinder
Replace in the event of leakage
Adjusting => Fig.
1

Hexagon bolt, 20 Nm
Clutch pedal
Located in position by clutch master cylinder adjustment
Slip onto shaft of mounting bracket

Removal and installation do not involve taking out mounting bracket.
To do so, remove shelf on left beneath dash panel.
Removing Footwell vents, central electrics, relay carriers and cover for central electrics => Fig.3

Removing over-centre spring => Fig
2
.
Replacement part supplied with moulded mounting bush which cannot be replaced

Over-centre spring
Yellow marking
Removing and installing
=> Fig.
2

Fig.1
Adjusting clutch master cylinder

a = 109.5mm ± 0.5mm

Turn fork to adjust.

Note:

When measuring, fork must beat right angles to contact surface of clutch master cylinder.
If clutch pedal does not reset automatically with fork correctly set, this may be due to:
Interchanged over-centre springs
Air in hydraulic system

Pedal not moving freely in mount.

Fig.2
Removing and installing over-centre spring

Remove the lower of both over-centre springs.
Detach fastener from pivot pin.
Tension over-centre spring with clutch pedal and press on retaining clamp 3246.
Detach over-centre spring together with assembly clamp 3246.

Fig.3
Unscrewing central electrics and relay carrier